diff --git a/topologies/README.md b/topologies/README.md
new file mode 100644
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--- /dev/null
+++ b/topologies/README.md
@@ -0,0 +1,3 @@
+# Topologies
+
+This directory contains various topologies useful to be kept.
diff --git a/topologies/abc.yaml b/topologies/abc.yaml
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index 0000000..73922af
--- /dev/null
+++ b/topologies/abc.yaml
@@ -0,0 +1,4 @@
+---
+links:
+  - domains: ['a', 'b']
+  - domains: ['b', 'c']
diff --git a/topologies/abc_leafv4.yaml b/topologies/abc_leafv4.yaml
new file mode 100644
index 0000000..d56ce93
--- /dev/null
+++ b/topologies/abc_leafv4.yaml
@@ -0,0 +1,7 @@
+---
+links:
+  - domains: ['a', 'b']
+  - domains: ['b', 'c']
+domains:
+  b:
+    enable_v4: false